This is a - if not solved, then certainly addressed - problem. Your specific example of: > So, a search for 'mueller' should also find 'Müller'. Is discussed

This is a - if not solved, then certainly addressed - problem. Your specific example of: > So, a search for 'mueller' should also find 'Müller'. Is discussed here: https://discuss.elastic.co/t/u-umlaut-search-indexing-user-name-muller-search-fails-for-muller-but-success-for-muller/60317/2 https://discuss.elastic.co/t/u-umlaut-search-indexing-user-n... If your question is specifically "How do I use a feature that PostgreSQL 12 doesn't have?" then you've got a different problem. [EDIT] Refer the modules mentioned on slide 26 - these may help with your indexing challenges within PostgreSQL